Paper-pulping and like machine.



L. THIRY.

PAPER PULPING AND LIKE MACHINE.

APPLICATION FILED 0CT.2i. 1913.

1,159,433. Patented Nov. 9, 1915.

Witnesses; Invento r:

Attorney.

LEON THIRY, HUY, BELGIUM.

PAPER-PULPING AND LIKE MACHINE.

Specification of Letters Patent.

Patented Nov. 9, 1915.

Application filed October 21, 1913. Serial No. 796,449.

To (all whom it may concern.

Be it known that I, LnoN THIRY, a subject of Belgium, and resident of Huy, in the Kingdom of Belgium, have invented certain new and useful Improvements Relating to Paper-Pulping and like Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanyingdrawings, and to letters or figures of reference marked therein, which form a part of this specification.

This invention has reference to paper pulping machines and has for its object to provide an improved device applicable to the pulping or breaking. machines employed for pulping old paper waste or shavings and mechanical or chemical pastes whereby access to the a paratus may be facilitated.

Pulping machines of the character above referred to are provided with an upper detachable portion or cover and it is convenient to be able to lift readily and to maintain it in such raised position in order to afford access to the interior of the apparatus. These covers however constitute heavy members 7 which it is difficult and tedious to operate by hand while it is also necessary to provide an appropriate locking device for holding the cover open which complicates operations. In the device which forms the object of the present invention these difficulties are overcome by utilizing water under pressure for opening the cover. lVith this end in view the cover is actuated by the rod of the piston of a hydraulic jack the cylinder of which is secured to the fixed framework of the apparatus. The application of hydraulic pressure beneath the piston enables the cover to be rapidly raised and maintained in the open position while if the pressure is gradually diminished the cover can be closed without shock.

In order that my invention may be readily understood and carried into effect I will now proceed to describe the same fully for which -purpose reference is to be had to the accomnanying drawings:

Figure 1 is an end elevation of a pulping machine illustrating the application of my improved device thereto. Fig. 2 is a side elevation and Fig. 3 a plan of the apparatus without the operating mechanism.

The machine comprises two half cylinders 1 and 3 the fixed portion 1 being carried by supports 2 and the movable portion or cover 3 being provided with a charging hopper. The two portions 1 and 3 of the apparatus are connected by a suitable device enabling the cover 3 to be rotated in the embodiment of the invention here illustrated the cover 3 is provided with'two knife edges 4 and i the edges of which are supported by the members 5 and 5.

The piston 6 of the hydraulic jack is formed with a knife edge 13 which bears against a member 7 integral with the cover 3. Its lower extremity enters the cylinder 8 which is supported by the fixed portion 1 in such a manner that it is able to pivot around an axis parallel with the axis of rotation of the cover. In the embodiment of the invention here illustrated two knife edges 9 and 9 are employed their edges resting in an angle of the member 10.

The interior of the hydraulic cylinder 8 can be placed in communication b an orifice 11 with an appropriate conduit provided with a cock whereby water under pressure can be delivered to the interior of the cylinder for lifting the cover and of allowing this water to escape to the exterior for the purpose of closing the cover.

V hen no system of water under pressure is available a pump 12 (Fig. 1) may be employed said pump being fitted directly to the cylinder 3 and adapted to rotate simultaneously with it around the knife edges 9 and 9 in such a manner as to avoid the necessity for using flexible pipes for the water under pressure. The pump is provided with a cock for the discharge of the water during the closing of the cover.

To enable the cover to pivot the knife edges 4 and a it is necessary to arrange it in such a manner that in any position of the cover its center of gravity is located in a vertical line passing into the interior of the triangle formed by the points 4:, l and 13. With this arrangement the closing of the cover takes place under the influence of gravity. In order to prevent the aforesaid center of gravity from extending beyond the vertical plane passing through the knife edges 4 and 4: a groove is formed along a generating line of the piston (3 the extremity of said groove protruding from the cylinder at the end of the opening movement of the cover thus placing the interior of the cylinder 8 in communication with the exterior in such a manner that the piston 6 ceases to rise even if the Water under pressure is still introduced into the cylinder.

Under my invention I am enabled to employ a single operating jack and to utilize knife edges instead of hinges at the points 4, at, 13, 9 and 9. In this manner accidents which are liable to occur from the fracture of hinges as a result of rusting or introduction of foreign bodies is avoided.

The axis of rotation of the cover can be located at a suitable distance from the body of the apparatus so that when the cover is open the interior of the apparatus is accessible from all sides.

Claims:

' 1. In a paper pulping or like machine, a cover pivoted on knife edges, a hydraulic jack adapted to cause said cover to rotate on said knife edges, and means whereby said hydraulic jack may pivot around an axis parallel With the axis of rotation of the cover.

2. In a paper pulping or like machine, a fixed half cylinder, a movable half cylinder, a hydraulic jack for rotating said movable half cylinder and means whereby said hydraulic jack may pivot around an axis parallel With the axis of rotation of the cover.

3. In a. paper pulping or like machine; a fixed half cylinder, a rotatable half cylinder, a hydraulic jack pivoted on said fixed half cylinder, and adapted to rotate said rotatable half cylinder.

the combination of a rotatable cover, a

piston rotating said cover, a cylinder inclosing said piston, means for introducing Water under pressure beneath the piston to raise same and rotate said cover, and means for placing the interior of the cylinder in communication with the atmosphere when said piston takes a determined position.

(5. In a paper pulping or like machine the combination of a rotatable cover, a piston rotating said cover, a cylinder inclo-sing said pisto11,1neans for introducing Water under pressure beneath said piston, and a groove cut in the piston and placing the interior of the cylinder in communication with the at mosphere When said piston takes a determined position.

7. In a paper pulping or like machine a cover pivoted on knife edges, a piston rotating said cover, means for introducing Water under pressure beneath said piston and means for preventing the rotation of the cover beyond a predetermined point;

In testimony whereof I afiix my signature in presence of tWo Witnesses.

' LEON THIRY.

Witnesses:

Gnonens VAN DER HAEGHEN, LEONARD LEVA.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

